This is a good question. One of the first things that Mollie asks when the animals are talking about the rebellion is whether there will be sugar. This might sound like an odd and unimportant question, but it does show where Mollie's heart and priority is. According to the text, even after the rebellion, Mollie did not wholly embrace the new state of affairs. She would come to work late and leave early. At one point, she would be missing for days. She went over to other human farms. She found life there easier and more to her liking. They had sugar and ribbons for her hair. We know that she wanted this, because these objects were found hidden in her stall. Her is what the text says:

A thought struck Clover. Without saying anything to the others, she went to Mollie’s stall and turned over the straw with her hoof. Hidden under the straw was a little pile of lump sugar and several bunches of ribbon of different colours.

Three days later Mollie disappeared. For some weeks nothing was known of her whereabouts, then the pigeons reported that they had seen her on the other side of Willingdon.

Since Animal Farm is an allegory, we need to ask whom Mollie represents. If we do this, Mollie represents the aristocracy, who really only care about wealth.